【OpenHarmony开源贡献者计划2022】 json格式错误，删除多余的逗号

json格式错误，删除多余的逗号

 
Signed-off-by: danchenz <danchenz@isoftstone.com> 
Signed-off-by: N陈丹 <danchenz@isoftstone.com>

zh-cn/application-dev/quick-start/start-with-ets-fa.md

@@ -137,7 +137,7 @@
               "pages": [
                 "pages/index",
                 "pages/second"
-              ],
+              ]
               }
           ]
         }